Overview
- A team at the Feinstein Institutes implanted five microelectrode arrays in a patient’s motor and sensory cortex and used machine learning to decode movement intentions into electrical stimulation of his forearm muscles.
- Sensors in a 3D-printed wearable brace sent pressure data back to the sensory cortex to recreate touch, closing a bidirectional motor-sensory loop that let the patient feed himself and handle fragile objects.
- After about 35 weeks of training the patient showed large objective gains—reportedly an 86% increase in right-arm strength and 62% in the left—and regained fine control such as lifting eggshells without breaking them.
- An unintended three-month stoppage of stimulation revealed that many motor and sensory gains persisted while the device was off, which the team says points to lasting neuroplastic rewiring rather than only temporary support.
- Authors stress this is a single-case, peer-reviewed report and call for replication across more patients and injury types before wider clinical use, while they refine the system and prepare expanded trials.